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post #2 of Old 03-05-2013
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Re: PYI PSS shaft seal bellows replacement on Crealock 37

You'll need to get the coupling off the shaft, remove the PYI collar and retract the shaft far enough to R&R the bellows.. whether the prop needs to come off depend in it's configuration and any interference with the rudder as far as creating enough space to do that.

Careful about any burrs on the keyslot/coupling area when you slide the collar off and back on; You'll want to replace the orings and set screws on the collar with new too.

The link is for new installs, but worth the read:


1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)

Last edited by Faster; 03-05-2013 at 02:02 PM.
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